ProfileViewer: Add a timeline widget for a visual view of the profile

Userspace stack frames are in blue, kernel stack frames in red :^)

1 files changed, 23 insertions, 6 deletions

diff --git a/DevTools/ProfileViewer/Profile.h b/DevTools/ProfileViewer/Profile.h
index 0b78f82d16..13c83beb46 100644
--- a/DevTools/ProfileViewer/Profile.h
+++ b/DevTools/ProfileViewer/Profile.h
@@ -11,14 +11,15 @@ class ProfileModel;
 
 class ProfileNode : public RefCounted<ProfileNode> {
 public:
-    static NonnullRefPtr<ProfileNode> create(const String& symbol, u32 address, u32 offset)
+    static NonnullRefPtr<ProfileNode> create(const String& symbol, u32 address, u32 offset, u64 timestamp)
     {
-        return adopt(*new ProfileNode(symbol, address, offset));
+        return adopt(*new ProfileNode(symbol, address, offset, timestamp));
     }
 
     const String& symbol() const { return m_symbol; }
     u32 address() const { return m_address; }
     u32 offset() const { return m_offset; }
+    u64 timestamp() const { return m_timestamp; }
 
     u32 sample_count() const { return m_sample_count; }
 
@@ -34,7 +35,7 @@ public:
         m_children.append(child);
     }
 
-    ProfileNode& find_or_create_child(const String& symbol, u32 address, u32 offset)
+    ProfileNode& find_or_create_child(const String& symbol, u32 address, u32 offset, u64 timestamp)
     {
         for (int i = 0; i < m_children.size(); ++i) {
             auto& child = m_children[i];
@@ -42,7 +43,7 @@ public:
                 return child;
             }
         }
-        auto new_child = ProfileNode::create(symbol, address, offset);
+        auto new_child = ProfileNode::create(symbol, address, offset, timestamp);
         add_child(new_child);
         return new_child;
     };
@@ -55,10 +56,11 @@ public:
     void sort_children();
 
 private:
-    explicit ProfileNode(const String& symbol, u32 address, u32 offset)
+    explicit ProfileNode(const String& symbol, u32 address, u32 offset, u64 timestamp)
         : m_symbol(symbol)
         , m_address(address)
         , m_offset(offset)
+        , m_timestamp(timestamp)
     {
     }
 
@@ -67,6 +69,7 @@ private:
     u32 m_address { 0 };
     u32 m_offset { 0 };
     u32 m_sample_count { 0 };
+    u64 m_timestamp { 0 };
     Vector<NonnullRefPtr<ProfileNode>> m_children;
 };
 
@@ -79,10 +82,24 @@ public:
 
     const Vector<NonnullRefPtr<ProfileNode>>& roots() const { return m_roots; }
 
+    template<typename Callback>
+    void for_each_sample(Callback callback)
+    {
+        m_json.for_each([&](auto& value) {
+            callback(value.as_object());
+        });
+    }
+
+    u64 length_in_ms() const { return m_last_timestamp - m_first_timestamp; }
+    u64 first_timestamp() const { return m_first_timestamp; }
+    u64 last_timestamp() const { return m_first_timestamp; }
+
 private:
-    explicit Profile(const JsonArray&, Vector<NonnullRefPtr<ProfileNode>>&&);
+    explicit Profile(const JsonArray&, Vector<NonnullRefPtr<ProfileNode>>&&, u64 first_timestamp, u64 last_timestamp);
 
     JsonArray m_json;
     RefPtr<ProfileModel> m_model;
     Vector<NonnullRefPtr<ProfileNode>> m_roots;
+    u64 m_first_timestamp { 0 };
+    u64 m_last_timestamp { 0 };
 };